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Intensified smelting method for titanium slag in blast furnace

A smelting method and blast furnace technology, applied to blast furnaces, blast furnace details, furnaces, etc., can solve problems such as difficult to achieve and high management costs, and achieve the effect of shortening the smelting cycle

Active Publication Date: 2020-09-08
WUKUN STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, under this condition, the corresponding blast furnace smelting technology has been developed, breakthroughs have been made in the selection and optimization of key smelting parameters of the air supply system, and the upper adjustment method has been compatible with the new blast furnace parameters such as air supply parameters, heat system, and slagging system. The smelting parameters are more matched and coordinated, and the combination mode of high-silicon, high-alumina, high-alkalinity sinter (including small-size sinter) and large proportion of low-grade vanadium-titanium pellets and the combination of low-grade and high utilization coefficient in this mode have been obtained. The blast furnace smelting method solves the technical problem that it is difficult to continuously improve the utilization factor and run smoothly for a long time according to conventional smelting parameters under the condition of large-scale and large-scale use of local and surrounding raw materials and fuels, resulting in high fixed costs and management costs. , and form the characteristics of large-scale high-intensity smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The enhanced smelting method of titanium slag in the blast furnace in this embodiment, in the smelting process, the ore and coke distribution amount of each ring under the distribution matrix is ​​used R 每环矿、焦布料量 , satisfy the following conditions:

[0052] m 每环矿石布料量 = m 矿批重 / Number of ore distribution rings, kg / ring;

[0053] m 每环焦炭布料量 = m 焦批重 / Number of coke rings, kg / ring;

[0054] Cloth full gear coke angle difference R 布料焦矿角度差 Meet the following conditions:

[0055] R 布料焦矿角度差 =Ʃ( Ø 焦炭1,2,3,… x P 焦炭1,2,3… ) / n 焦 -Ʃ( Ø 矿石1,2,3,… x P 矿石1,2,3… ) / n 矿 ;

[0056] in:

[0057] Ø 焦炭1,2,3,… It is the angle value (°) of each gear of the coke cloth in the cloth matrix;

[0058] P 焦炭1,2,3… is the number of cloth rings at each gear angle of coke cloth in the cloth matrix;

[0059] n 焦 is the total number of rings of coke cloth in the matrix;

[0060] Ø 矿石1,2,3,…It is the angle value (°) of each gear of the ore cloth in the cloth matrix;

...

Embodiment 2

[0076] The method for intensified smelting of titanium slag in the blast furnace of the present embodiment goes through the following steps:

[0077] A. The ore with the following mass ratio:

[0078] High alkali sinter 59.40%, small particle size high alkalinity sinter 5.06%, vanadium titanium pellets 35.54%, the sum of the above minerals is 100%, and the coke and coal powder with higher ash and sulfur content are sent into the in the blast furnace.

[0079] High-alkali sinter and small-size sinter are obtained by adding 10% vanadium-titanium concentrate to the sintering ingredients. The composition is: TFe 52.05%, SiO 2 5.85%, CaO 11.86%, MgO 3.03%, TiO 2 1.97%, S 0.070%, Al 2 o 3 2.18%, MnO0.45%, FeO7.87%. The small-sized sinter is obtained by sieving through a 7mm single-layer sieve after sieving the upper and lower 6mm and lower 5mm double-layer sieves of the blast furnace tank.

[0080] Vanadium-titanium pellets are purchased from the Panxi area and screened by ...

Embodiment 3

[0089] The method for intensified smelting of titanium slag in the blast furnace of the present embodiment goes through the following steps:

[0090] A. The ore with the following mass ratio:

[0091] High alkali sinter 54.54%, small particle size high alkalinity sinter 9.43%, vanadium titanium pellets 36.04%, the sum of the above minerals is 100%, coke and coal powder with higher ash and sulfur content will be sent to into the blast furnace.

[0092] High-alkali sinter and small-size sinter are obtained by adding 10% vanadium-titanium concentrate to the sintering ingredients. The composition is: TFe 52.73%, SiO 2 5.36%, CaO 11.62%, MgO 2.86%, TiO 2 1.76%, S 0.060%, Al 2 o 3 2.23%, MnO 0.36%, FeO 7.99%; the small-sized sinter is obtained by screening the upper 6mm and lower 5mm double-layer sieves under the blast furnace tank, and then sieving through a 7mm single-layer sieve.

[0093] Vanadium-titanium pellets are purchased from the Panxi area and screened by a single...

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Abstract

The invention relates to an intensified smelting method for titanium slag in a blast furnace. The method comprises the following steps of proportioning, smelting, smelting parameter setting and conventional slag tapping and iron tapping. The working state of a hearth is good, the uniformity and the activity degree are remarkably improved, a low-silicon and high-physical-heat molten iron new stateis obtained, the low-silicon range and the deviation value of the molten iron are further controlled, the fluidity and the stability of the slag iron are improved, and the long-period stable smeltingof low-silicon and low-sulfur qualified pig iron with the utilization coefficient of the blast furnace of 3.65 t / (m<3>.d) is realized. By remarkably improving the annual output of the single blast furnace, the allocation of fixed assets of unit pig iron, financial management, labor wages, electric charges and the like are remarkably reduced, so that the smelting preparation cost of ton iron is reduced.

Description

technical field [0001] The invention relates to a blast furnace smelting method, in particular to an intensified smelting method of titanium slag in a blast furnace, and belongs to the technical field of blast furnace smelting. Background technique [0002] In the production process of iron and steel complexes, the cost of pig iron smelting accounts for 70-75% of the total cost per ton of material, and the cost of raw and fuel for pig iron accounts for more than 90% of the cost of pig iron. In addition, the ironmaking process is a heavy industry and a large energy consumer with huge investment, huge consumption of monomer materials, huge capital occupation in production and operation, and relatively labor-intensive heavy industry. The annual amount of the total cost is also very huge. The unit cost is usually 300~500 yuan / t iron, and the annual total amount of a single blast furnace can reach more than hundreds of millions of yuan. [0003] Therefore, all kinds of iron and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C21B5/04
CPCC21B5/003C21B5/008C21B5/04
Inventor 林安川吴仕波刘宁斌陈涛汪勤峰张红斌
Owner WUKUN STEEL
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